I was fortunate to receive a 15ml deluxe bottle for test/review. I was genuinely surprised and impressed with the results in such a short time. After a few weeks of twice daily use there was a visible plumping of finer lines and a promising and pleasing 'lift' with nose to mouth folds. The P-Tiox Serum is unlike any other serum available to purchase in beauty outlets. To fully benefit , this serum full size is 30ml and recommended to use both AM/PM To reduce natural folds and can also be used to prolong aftercare for injectable treatments.